I cannot answer your questions exactly but I have an old Zildjian catalog copyright 1987 where it has the mini cup ride. So I would probably say that it is released in the early 80's or late 70's. From the catalog I have in the late 90's it is not included anymore. Here are the 2 pages of the catalog where it still has the mini cup ride.

guys ano difference ng A mastersound sa K mastersound hats? which one would you prefer? thanks!

I agree with A mastersound sounding a bit heavier from the K; the A actually sounds a tad A custom-ish to me since the mastersound bottom produces extra chick which is the main feature of all mastersound hats. The K remains a bit drier sounding.

"Zildjian is coming out with a couple new lines this summer. One is called the "Pitch Black" line which are made for rock/metal and are coated in a cool black matte color. Another one is the A Custom "REZO" crash's. They are similiar to the K hybrids with alternate fat and pin lathing techniques. and also a 2nd generation line of K custom Dry complex rides. A little heavier than the first ones with differently shaped bells."

"Zildjian is coming out with a couple new lines this summer. One is called the "Pitch Black" line which are made for rock/metal and are coated in a cool black matte color. Another one is the A Custom "REZO" crash's. They are similiar to the K hybrids with alternate fat and pin lathing techniques. and also a 2nd generation line of K custom Dry complex rides. A little heavier than the first ones with differently shaped bells."

-from pdf (so im not sure)

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"I BELIEVE IN CHRIST LIKE I BELIEVE IN THE SUN. NOT BECAUSE I CAN SEE IT, BUT BY IT, I CAN SEE EVERYONE ELSE....."

"Zildjian is coming out with a couple new lines this summer. One is called the "Pitch Black" line which are made for rock/metal and are coated in a cool black matte color. Another one is the A Custom "REZO" crash's. They are similiar to the K hybrids with alternate fat and pin lathing techniques. and also a 2nd generation line of K custom Dry complex rides. A little heavier than the first ones with differently shaped bells."